Gregory Retallack is a kind of maverick paleontologist, who endorses a fringe hypothesis that Ediacaran organisms were not marine but terrestrial lichens.
Even though the differences appear superficially striking, they do not involve any novel body plans (i.e., no new proteins, new tissues, or new organs).
There is a strange fact that shows that any interpretation of these trace fossils has to be taken with a grain of salt.
The body fossils are generally positioned at the focal points of the fan-shaped scratch marks.
A former teacher of mine was the late Adolf Seilacher, who was a leading authority on trace fossils and who for obvious reasons preferred to be called “Dolf.”